Question is: "A metallic object is electroplated with copper using a solution of copper(II) sulfate. Which statementis correct?" A. The positive electrode increases in mass. B. The concentration of Cu2+ ions in the solution decreases. C. Reduction occurs at the positive electrode. D. The reaction occurring at the negative electrode is Cu2+ + 2e− → Cu. The right answer is D but I would consider that B is also correct. However, B is not correct but do you know why? Thank you in advance!